RDR2 runs at native 4k on X1X and looks really great. Of course it only runs at 30 fps but rock solid. The X1X has 6 teraflops of power but the XsX has 12 teraflops and also has hardware ray tracing support. CPU the X1X was weak with it's 8 core 8 thread 2.3 Ghz Jaguar modified cores, the XsX has Ryzen 8 core 16 thread at 3.8 Ghz. This takes it from a very weak CPU to a high end powerful CPU.
The hardware difference between the X1X which is pretty good for current gen vs XsX is just staggering. It's like comparing a PC with a low power old school laptop CPU 8 core 8 thread at 2.3 ghz and a RX 580 GPU vs a PC with full desktop high end CPU at 3.8 Ghz 8 core 16 thread and a RTX 2080 Super for GPU.
We can expect the bump from 30fps to 60fps but there has to be a lot more. Is it going to be fully ray traced 60 fps and native 4k? Or is it going to be a mild improvement that disappoints?
What do you expect from current gen graphical masterpieces such as RDR2 when they are optimized for next gen consoles?